EP2873605B1 - Ship of contra-rotating propeller propulsion-type - Google Patents
Ship of contra-rotating propeller propulsion-type Download PDFInfo
- Publication number
- EP2873605B1 EP2873605B1 EP13830463.9A EP13830463A EP2873605B1 EP 2873605 B1 EP2873605 B1 EP 2873605B1 EP 13830463 A EP13830463 A EP 13830463A EP 2873605 B1 EP2873605 B1 EP 2873605B1
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- EP
- European Patent Office
- Prior art keywords
- propeller
- rudder
- pod
- propulsion unit
- rudder plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000007246 mechanism Effects 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
- B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/02—Initiating means for steering, for slowing down, otherwise than by use of propulsive elements, or for dynamic anchoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
- B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
- B63H2005/106—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type with drive shafts of second or further propellers co-axially passing through hub of first propeller, e.g. counter-rotating tandem propellers with co-axial drive shafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
- B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
- B63H2005/1258—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with electric power transmission to propellers, i.e. with integrated electric propeller motors
Definitions
- the present invention relates to a ship in which a main propeller and a propeller of a pod propulsion unit configure a contrarotating propeller.
- a ship provided with a pod propulsion unit is known.
- the pod propulsion unit is provided with a pod and a propeller which is driven by a propeller driving mechanism disposed in the pod.
- a propulsion function is achieved by the propeller.
- a steering function is achieved by changing the orientation of the pod propulsion unit by a steering mechanism disposed in the hull.
- JP 2006-103490A discloses a ship provided with a pod propulsion unit.
- the pod propulsion unit is installed to a hull shell plate in the rear portion of the hull through a strut to be rotatable around a perpendicular axis.
- This ship is provided with a steering unit which is independent from the pod propulsion unit.
- the rudder plate of the independent steering unit is arranged behind the strut and is installed to the hull to be rotatable around a perpendicular axis. The rudder plate can be rotated without an interference that strut and the rudder collide.
- the pod propulsion unit is not operated or is operated by a small rudder angle at the time of a steering operation test in a test sailing, a high-speed sailing, or a large rudder angle sailing for urgent avoidance, and the rudder plate of the independent steering unit is operated to a necessary rudder angle, e.g. a maximum rudder angle to generate enough rudder force. Because the rudder plate is arranged behind the strut in neighborhood to the strut, the large rudder force can be obtained by using the interference with a flow of water. Because the pod propulsion unit is not operated or is operated by the small rudder angle, there is no case that the large force acts on the pod propulsion unit, and furthermore damage due to erosion can be prevented. Note that JP 2006-103490A does not disclose that a contrarotating propeller is configured from the propeller of the pod propulsion unit and another propeller.
- JP 2004-182096A discloses a ship that a main propeller and a propeller of a pod type propulsion unit configure a contrarotating propeller.
- the pod type propulsion unit has a support axis installed to the hull to be rotatable, a body section installed to the lower end of the support axis, a fin installed under the body section, and a propeller rotatably driven by a motor built in the body section.
- the support axis is rotatably driven by a motor disposed in the hull.
- both of the support axis and the fin function as rudders.
- two rudders are disposed for both sides of the pod type propulsion unit.
- the two rudders are arranged in middle positions between the centerline of the hull and the sides of the ship. Because the ship has the pod type propulsion unit with the support axis to achieve the function of the rudder, the ship does not originally have to provide the two rudders. However, in a high-speed sailing, cavitation occurs in the neighborhood of the support axis. Because this cavitation is remarkable as the rudder angle is large, the rudder angle of the support axis is limited to an angle within a predetermined angle range in the high-speed sailing. Thus, because it brought about hinderance to the sailing of the ship, the two rudders are provided.
- JP 2004-182096A discloses another ship in which the main propeller and the propeller of the pod type propulsion unit configure the contrarotating propeller.
- one rudder is installed behind the pod type propulsion unit. Because it is sufficient to provide a single rudder, an installation cost is reduced, compared with a case to install two rudders.
- the rudder is provided in a position where the rudder interacts with a water flow generated by the main propeller and the propeller of the pod type propulsion unit, an enough steering ability can be secured even if the rudder is singular.
- JP 2003-212189A discloses a ship in which a main propeller, a pod propulsion unit, and a rudder are provided in order from the bow side to be aligned on a keel line.
- JP S60-114097U1 on which the preamble portion of claim 1 and 5 is based, discloses a ship with a main propeller, a pod propulsion unit arranged to be steered through a rotation axis that extends through a rudder stock integral with the rear portion of the hull of the ship, a propeller driving mechanism in the pod propulsion unit, a pod propeller arranged to be driven by the propeller driving mechanism and positioned on the forward end of the pod propulsion unit so as to face the main propeller and rotate in a direction opposite to the main propeller, and a main rudder plate straddling the rear part of the pod propulsion unit above and below the level of the rotation axis of the pod propeller.
- An object of the present invention is to restrain the increase of resistance due to a rudder (auxiliary rudder) provided except for a pod propulsion unit while maintaining CRP (contrarotating propeller) effect in a high-speed sailing, in a ship that a main propeller and a propeller of the pod propulsion unit configure a contrarotating propeller.
- a ship according to the present invention includes the features of claim 1 and a method of steering a ship with the features of claim 5.
- a front end of the rudder plate includes a front end underside part and a front end topside part extending vertically from the front end underside part.
- a rear end of the strut includes a rear end underside part and a rear end topside part extending vertically from the rear end underside part.
- the swirl flow generated by the main propeller is recovered by the pod propeller, and the rudder angle of the rudder plate is made large.
- the increase of resistance due to a rudder (auxiliary rudder) provided except for a pod propulsion unit is restrained while maintaining the CRP (contrarotating propeller) effect in a high-speed sailing.
- the ship according to a first embodiment of the present invention is provided with a hull 10, a steering mechanism 11 disposed in the hull 10, a steering mechanism 12 disposed in the hull 10, a main propeller 20, a pod propulsion unit 30 and a rudder plate 40.
- the steering mechanisms 11 and 12 are sometimes referred to as steering gears.
- the pod propulsion unit 30 is provided with a pod-shaped casing 31, a propeller driving mechanism 32 disposed in the casing 31, a pod propeller 33 driven by the propeller driving mechanism 32, a strut 34 installed to the casing 31 and a fin 36 installed to the casing 31.
- the fin 36 is arranged under the casing 31.
- the propeller driving mechanism 32 is provided with a motor.
- the strut 34 is arranged on the casing 31 and has a function as a rudder.
- the main propeller 20 is driven by a main engine (not shown) disposed in the hull 10.
- the pod propulsion unit 30 is operated by the steering mechanism 11.
- the rudder plate 40 is operated by the steering mechanism 12.
- the rudder angle of the rudder plate 40 can be set independently from the pod propulsion unit 30.
- the pod propulsion unit 30 is arranged behind the main propeller 22.
- the rudder plate 40 is arranged behind the strut 34.
- the bottom end 42 of the rudder plate 40 is arranged in a position which is upper than a rotation axis S of the pod propeller 33. It is desirable that the section shapes of the strut 34 and rudder plate 40 are a wing form.
- the main propeller 20, the pod propulsion unit 30 and the rudder plate 40 are arranged on a hull centerline C.
- the rudder angles of the pod propulsion unit 30 and rudder plate 40 are both zero in the condition shown in FIG. 1 , and the pod propeller 33 is arranged in front of the casing 31. That is, the pod propeller 33 is arranged behind the main propeller 20 in the neighborhood of the main propeller 20. The main propeller 20 and the pod propeller 33 configure a contrarotating propeller. Because the strut 34 of the pod propulsion unit 30 and the rudder plate 40 are desirably as close to each other as possible, at least a part of the front end 41 of the rudder plate 40 is in front of the rear end 31a of the casing 31.
- the rudder angles of the pod propulsion unit 30 and rudder plate 40 are zero or angles near zero.
- the main propeller 20 and the pod propeller 33 rotate in directions opposite to each other and configure a contrarotating propeller. That is, the CRP (contrarotating propeller) effect can be achieved in which the swirl flow generated by the main propeller 20 is recovered through the rotation of the pod propeller 33.
- the energy saving effect is achieved by the CRP effect.
- the rudder angle of the rudder plate 40 is made large while the rudder angle of the pod propulsion unit 30 is maintained to an angle at which the CRP effect is achieved.
- the CRP effect is maintained at the high-speed sailing. Note that there is a possibility that the CRP effect is lost, if the steering is carried out by using the pod propulsion unit 30 at the high-speed sailing.
- the rudder plate 40 as one-sheet rudder is disposed behind the strut 34 as an auxiliary rudder. Therefore, compared with a case that two rudders are provided for both sides of the pod propulsion unit 30, the increase of resistance due to the auxiliary rudder can be restrained. For example, in case of some condition, the resistance increase when the two rudders are provided for both sides of the pod propulsion unit 30 is about 3%, but the resistance increase when the rudder plate 40 is provided is about 1%.
- the rudder plate 40 and the strut 34 of the pod propulsion unit 30 are close to each other. Therefore, the resistance increase due to the rudder plate 40 becomes very small.
- the rudder plate 40 is arranged in the water flow accelerated by the main propeller 20 and the pod propeller 33. Therefore, the rudder force increases in an identical rudder angle and in an identical rudder area, compared with a case that the two rudders are provided for both sides of the pod propulsion unit 30. For example, in case of some condition, the increase of rudder force equal to or more than about 20% can be achieved.
- the cost of the whole rudder system including the rudder plate and the steering mechanism can be reduced.
- the ship and the method of steering the ship according to a second embodiment of the present invention are same as those of the first embodiment except for the following description.
- the front end 41 of the rudder plate 40 is provided with a front end underside part 41a and a front end topside part 41b.
- the front end topside part 41b is arranged on the front end underside part 41a and extends vertically from the front end underside part 41a.
- the rear end 35 of the strut 34 is provided with a rear end underside part 35a and a rear end topside part 35b.
- the rear end topside part 35b is arranged on the rear end underside part 35a and extends vertically from the rear end underside part 35a.
- the front end underside part 41a is arranged behind the rear end underside part 35a.
- the front end topside part 41b is arranged behind the rear end topside part 35b.
- the front end underside part 41a and the rear end underside part 35a are arranged to be substantially parallel to each other, and the front end topside part 41b and the rear end topside part 35b are arranged to be substantially parallel to each other. Therefore, a space between the rudder plate 40 and the strut 34 can be made narrow and the resistance increase due to the rudder plate 40 is further restrained.
- the ship and a method of steering the ship according to the present invention have been described with reference to the embodiments.
- the present invention is not limited to the above embodiments.
- the embodiments may be modified and combined.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
- Exhaust Silencers (AREA)
- Toys (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Description
- The present invention relates to a ship in which a main propeller and a propeller of a pod propulsion unit configure a contrarotating propeller.
- A ship provided with a pod propulsion unit is known. The pod propulsion unit is provided with a pod and a propeller which is driven by a propeller driving mechanism disposed in the pod. A propulsion function is achieved by the propeller. A steering function is achieved by changing the orientation of the pod propulsion unit by a steering mechanism disposed in the hull.
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JP 2006-103490A - The pod propulsion unit is not operated or is operated by a small rudder angle at the time of a steering operation test in a test sailing, a high-speed sailing, or a large rudder angle sailing for urgent avoidance, and the rudder plate of the independent steering unit is operated to a necessary rudder angle, e.g. a maximum rudder angle to generate enough rudder force. Because the rudder plate is arranged behind the strut in neighborhood to the strut, the large rudder force can be obtained by using the interference with a flow of water. Because the pod propulsion unit is not operated or is operated by the small rudder angle, there is no case that the large force acts on the pod propulsion unit, and furthermore damage due to erosion can be prevented. Note that
JP 2006-103490A -
JP 2004-182096A -
JP 2004-182096A -
JP 2003-212189A -
JP S60-114097U1 - An object of the present invention is to restrain the increase of resistance due to a rudder (auxiliary rudder) provided except for a pod propulsion unit while maintaining CRP (contrarotating propeller) effect in a high-speed sailing, in a ship that a main propeller and a propeller of the pod propulsion unit configure a contrarotating propeller.
- A ship according to the present invention includes the features of claim 1 and a method of steering a ship with the features of claim 5.
- Preferably, a front end of the rudder plate includes a front end underside part and a front end topside part extending vertically from the front end underside part. A rear end of the strut includes a rear end underside part and a rear end topside part extending vertically from the rear end underside part. When the rudder angles of the pod propulsion unit and the rudder plate are zero, the front end underside part is arranged behind the rear end underside part, and the front end topside part is arranged behind the rear end topside part. The front end underside part and the rear end underside part are substantially parallel to each other, and the front end topside part and the rear end topside part are substantially parallel to each other.
- In the method of steering the ship, the swirl flow generated by the main propeller is recovered by the pod propeller, and the rudder angle of the rudder plate is made large.
- According to the present invention, in the ship in which the main propeller and the propeller of the pod propulsion unit configure a contrarotating propeller, the increase of resistance due to a rudder (auxiliary rudder) provided except for a pod propulsion unit is restrained while maintaining the CRP (contrarotating propeller) effect in a high-speed sailing.
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FIG. 1 is a side view of a stern section of a ship according to a first embodiment of the present invention. -
FIG. 2 is a bottom view of the stern section of the ship according to the first embodiment. -
FIG. 3 is a side view of the stern section of the ship according to a second embodiment of the present invention. - A ship and a method of steering the ship according to embodiments of the present invention will be described below with reference to the attached drawings.
- Referring to
FIG. 1 , the ship according to a first embodiment of the present invention is provided with ahull 10, asteering mechanism 11 disposed in thehull 10, asteering mechanism 12 disposed in thehull 10, amain propeller 20, apod propulsion unit 30 and arudder plate 40. Thesteering mechanisms pod propulsion unit 30 is provided with a pod-shaped casing 31, apropeller driving mechanism 32 disposed in thecasing 31, apod propeller 33 driven by thepropeller driving mechanism 32, astrut 34 installed to thecasing 31 and afin 36 installed to thecasing 31. Thefin 36 is arranged under thecasing 31. For example, thepropeller driving mechanism 32 is provided with a motor. Thestrut 34 is arranged on thecasing 31 and has a function as a rudder. Themain propeller 20 is driven by a main engine (not shown) disposed in thehull 10. Thepod propulsion unit 30 is operated by thesteering mechanism 11. Therudder plate 40 is operated by thesteering mechanism 12. The rudder angle of therudder plate 40 can be set independently from thepod propulsion unit 30. Thepod propulsion unit 30 is arranged behind the main propeller 22. Therudder plate 40 is arranged behind thestrut 34. Thebottom end 42 of therudder plate 40 is arranged in a position which is upper than a rotation axis S of thepod propeller 33. It is desirable that the section shapes of thestrut 34 andrudder plate 40 are a wing form. - Referring to
FIG. 2 , themain propeller 20, thepod propulsion unit 30 and therudder plate 40 are arranged on a hull centerline C. - The rudder angles of the
pod propulsion unit 30 andrudder plate 40 are both zero in the condition shown inFIG. 1 , and thepod propeller 33 is arranged in front of thecasing 31. That is, thepod propeller 33 is arranged behind themain propeller 20 in the neighborhood of themain propeller 20. Themain propeller 20 and thepod propeller 33 configure a contrarotating propeller. Because thestrut 34 of thepod propulsion unit 30 and therudder plate 40 are desirably as close to each other as possible, at least a part of thefront end 41 of therudder plate 40 is in front of therear end 31a of thecasing 31. - Next, the method of steering the rudder according to the first embodiment will be described.
- When the ship according to the first embodiment sails at high speed, the rudder angles of the
pod propulsion unit 30 andrudder plate 40 are zero or angles near zero. Themain propeller 20 and thepod propeller 33 rotate in directions opposite to each other and configure a contrarotating propeller. That is, the CRP (contrarotating propeller) effect can be achieved in which the swirl flow generated by themain propeller 20 is recovered through the rotation of thepod propeller 33. The energy saving effect is achieved by the CRP effect. At the time of steering, the rudder angle of therudder plate 40 is made large while the rudder angle of thepod propulsion unit 30 is maintained to an angle at which the CRP effect is achieved. Thus, the CRP effect is maintained at the high-speed sailing. Note that there is a possibility that the CRP effect is lost, if the steering is carried out by using thepod propulsion unit 30 at the high-speed sailing. - According to the first embodiment, the
rudder plate 40 as one-sheet rudder is disposed behind thestrut 34 as an auxiliary rudder. Therefore, compared with a case that two rudders are provided for both sides of thepod propulsion unit 30, the increase of resistance due to the auxiliary rudder can be restrained. For example, in case of some condition, the resistance increase when the two rudders are provided for both sides of thepod propulsion unit 30 is about 3%, but the resistance increase when therudder plate 40 is provided is about 1%. Moreover, because at least a part of thefront end 41 of therudder plate 40 is in front of therear end 31a of thecasing 31, therudder plate 40 and thestrut 34 of thepod propulsion unit 30 are close to each other. Therefore, the resistance increase due to therudder plate 40 becomes very small. - According to the first embodiment, the
rudder plate 40 is arranged in the water flow accelerated by themain propeller 20 and thepod propeller 33. Therefore, the rudder force increases in an identical rudder angle and in an identical rudder area, compared with a case that the two rudders are provided for both sides of thepod propulsion unit 30. For example, in case of some condition, the increase of rudder force equal to or more than about 20% can be achieved. - According to the first embodiment, because the number of rudders and a rudder area necessary for the generation of identical rudder force can be reduced, compared with a case that the two rudders are provided for both sides of the
pod propulsion unit 30, the cost of the whole rudder system including the rudder plate and the steering mechanism can be reduced. - The ship and the method of steering the ship according to a second embodiment of the present invention are same as those of the first embodiment except for the following description.
- Referring to
FIG. 3 , thefront end 41 of therudder plate 40 is provided with a frontend underside part 41a and a front end topsidepart 41b. The front end topsidepart 41b is arranged on the frontend underside part 41a and extends vertically from the frontend underside part 41a. Therear end 35 of thestrut 34 is provided with a rearend underside part 35a and a rear end topsidepart 35b. The rear end topsidepart 35b is arranged on the rearend underside part 35a and extends vertically from the rearend underside part 35a. - When the rudder angles of the
pod propulsion unit 30 andrudder plate 40 are zero, the frontend underside part 41a is arranged behind the rearend underside part 35a. The front end topsidepart 41b is arranged behind the rear end topsidepart 35b. The frontend underside part 41a and the rearend underside part 35a are arranged to be substantially parallel to each other, and the front end topsidepart 41b and the rear end topsidepart 35b are arranged to be substantially parallel to each other. Therefore, a space between therudder plate 40 and thestrut 34 can be made narrow and the resistance increase due to therudder plate 40 is further restrained. - As described above, the ship and a method of steering the ship according to the present invention have been described with reference to the embodiments. However, the present invention is not limited to the above embodiments. The embodiments may be modified and combined.
Claims (5)
- A ship comprising:a main propeller (20);a pod propulsion unit (30) arranged to be steered by a first steering mechanism (11); anda rudder plate (40) arranged to be steered by a second steering mechanism (12),wherein said main propeller (20), said pod propulsion unit (30) and said rudder plate (40) are arranged on a hull centerline (C),wherein said pod propulsion unit (30) comprises:a casing (31);a propeller driving mechanism (32) disposed in said casing (31);a pod propeller (33) arranged to be driven by said propeller driving mechanism (32); anda strut (34) installed to said casing (31),wherein said pod propulsion unit (30) is arranged behind said main propeller (20),wherein said rudder plate (40) is arranged behind said strut (34),wherein said main propeller (20) and said pod propeller (33) configure a contrarotating propeller (CRP), andwherein, when rudder angles of said pod propulsion unit (30) and said rudder plate (40) are zero, at least a part of a front end (41) of said rudder plate (40) is in front of a rear end (31a) of said casing (31),characterized in thata bottom end (42) of said rudder plate (40) is arranged in a position which is above a rotation axis (S) of said pod propeller (33).
- The ship according to claim 1, wherein said front end (41) of said rudder plate (40) comprises a front end underside part (41a) and a front end topside part (41b) extending vertically from said front end underside part (41a),
wherein a rear end (35) of said strut (34) comprises a rear end underside part (35a) and a rear end topside part (35b) extending vertically from the rear end underside part (35a), and
wherein, when the rudder angles of said pod propulsion unit (30) and said rudder plate (40) are zero, said front end underside part (41a) is arranged behind said rear end underside part (35a), said front end topside part (41b) is arranged behind said rear end topside part (35b), said front end underside part (41a) and said rear end underside part (35a) are substantially parallel to each other, and said front end topside part (41b) and said rear end topside part (35b) are substantially parallel to each other. - The ship according to claim 1 or 2, wherein said strut (34) is arranged on the casing (31) and has a function as a rudder.
- The ship according to claim 1, 2 or 3, wherein the section shape of said strut (34) is a wing form.
- A method of steering a ship which comprises a main propeller (20), a pod propulsion unit (30) steered by a first steering mechanism (11), and a rudder plate (40) steered by a second steering mechanism (12),
wherein said main propeller (20), said pod propulsion unit (30) and said rudder plate (40) are arranged on a hull centerline (C),
wherein said pod propulsion unit (30) comprises:a casing (31);a propeller driving mechanism (32) provided in said casing (31);a pod propeller (33) driven by said propeller driving mechanism (32); anda strut (34) installed to said casing (31),wherein said pod propulsion unit (30) is arranged behind said main propeller (20),
wherein said rudder plate (40) is arranged behind said strut (34), and
wherein, when rudder angles of said pod propulsion unit (30) and said rudder plate (40) are zero, at least a part of a front end (41) of said rudder plate (40) is in front of a rear end (31a) of said casing (31),
the method comprising rotating said main propeller (20) and said pod propeller (33) in directions opposite to each other to configure a contrarotating propeller (CRP) and to recover a swirl flow generated by the main propeller (20) through the rotation of the pod propeller (33),
characterized byat the time of steering, making the rudder angle of the rudder plate (40) larger while maintaining the rudder angle of the pod propulsion unit (30) to an angle at which the effect of the contrarotating propeller (CRP) is achieved.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012183130A JP5972711B2 (en) | 2012-08-22 | 2012-08-22 | Counter-rotating propeller propulsion type ship |
PCT/JP2013/072409 WO2014030697A1 (en) | 2012-08-22 | 2013-08-22 | Contra-rotating propeller propulsion-type ship |
Publications (3)
Publication Number | Publication Date |
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EP2873605A1 EP2873605A1 (en) | 2015-05-20 |
EP2873605A4 EP2873605A4 (en) | 2015-07-08 |
EP2873605B1 true EP2873605B1 (en) | 2016-11-30 |
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EP13830463.9A Active EP2873605B1 (en) | 2012-08-22 | 2013-08-22 | Ship of contra-rotating propeller propulsion-type |
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US (1) | US9463856B2 (en) |
EP (1) | EP2873605B1 (en) |
JP (1) | JP5972711B2 (en) |
KR (2) | KR20150030768A (en) |
CN (1) | CN104540729A (en) |
WO (1) | WO2014030697A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105523160A (en) * | 2016-01-05 | 2016-04-27 | 上海船舶研究设计院 | Hub connecting structure of forward propeller and rear propeller of contrarotating propeller |
WO2017158204A1 (en) | 2016-03-18 | 2017-09-21 | Rolls-Royce Marine As | Steerable contra-rotating propulsion system |
KR102209085B1 (en) * | 2017-07-04 | 2021-01-27 | 한국조선해양 주식회사 | Propulsion apparatus for ship |
CN107521647A (en) * | 2017-09-12 | 2017-12-29 | 南京中船绿洲机器有限公司 | A kind of ship mixing is to turning propulsion system |
CN108622357A (en) * | 2018-05-11 | 2018-10-09 | 上海船舶研究设计院(中国船舶工业集团公司第六0四研究院) | Hang paddle arm formula to rotary device, to transfer from one department to another system and ship |
CN110789698A (en) * | 2018-08-01 | 2020-02-14 | 西门子股份公司 | Cavitation monitoring system and pod drive |
JP6473543B1 (en) * | 2018-09-05 | 2019-02-20 | 川崎重工業株式会社 | Swivel propulsion device and control method of swirl propulsion device |
CN113148091A (en) * | 2020-01-07 | 2021-07-23 | 肖荣祥 | Double-propeller hand-operated propeller |
CN112896448A (en) * | 2021-04-07 | 2021-06-04 | 中国船舶科学研究中心 | Water pool test method and data analysis method for ship propelled by hybrid contra-rotating pod |
CN114455053B (en) * | 2022-01-22 | 2023-03-07 | 嘉兴市锦佳船舶制造股份有限公司 | River and lake patrol ship |
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JPS6052198U (en) * | 1983-09-20 | 1985-04-12 | 三井造船株式会社 | Marine propulsion device |
JPS60114097U (en) * | 1984-01-11 | 1985-08-01 | 三井造船株式会社 | Marine propulsion device |
CN87214029U (en) | 1987-10-08 | 1988-10-26 | 中国船舶工业总公司七院第702研究所 | Contrary-turning paddle all-around traverse propeller |
DE10111910A1 (en) | 2001-03-13 | 2002-09-19 | Man B&W Diesel A/S, Copenhagen Sv | Hybrid diesel mechanical and electrical drive system for safe and adaptable ship operation |
JP3958051B2 (en) * | 2002-01-22 | 2007-08-15 | 三菱重工業株式会社 | Ship and its operation method |
JP3962678B2 (en) * | 2002-12-03 | 2007-08-22 | 三菱重工業株式会社 | Ship and ship navigation system |
FI115210B (en) | 2002-12-20 | 2005-03-31 | Abb Oy | Device in a propulsion system |
FI116129B (en) | 2003-04-07 | 2005-09-30 | Waertsilae Finland Oy | Watercraft Propulsion Unit |
FI20030556A0 (en) | 2003-04-11 | 2003-04-11 | Abb Oy | Method and equipment for steering the ship |
JP4012967B2 (en) * | 2003-07-29 | 2007-11-28 | 独立行政法人海上技術安全研究所 | Pod propeller ship |
JP2005255127A (en) * | 2004-03-15 | 2005-09-22 | Shin Kurushima Dockyard Co Ltd | Steering device of pod propelled vessel |
JP2006103490A (en) * | 2004-10-05 | 2006-04-20 | Ihi Marine United Inc | Vessel provided with pod propulsion unit |
CN101104439A (en) * | 2006-07-10 | 2008-01-16 | 般若科技股份有限公司 | High efficiency watercraft propulsion system |
JP5524672B2 (en) * | 2009-04-01 | 2014-06-18 | 新潟原動機株式会社 | Marine propulsion device |
FI123164B (en) * | 2010-12-21 | 2012-11-30 | Waertsilae Finland Oy | WATER VESSEL |
EP2670656A1 (en) * | 2011-01-31 | 2013-12-11 | Abb Oy | Arrangement for steering a ship and for supplying power to its propulsion system |
-
2012
- 2012-08-22 JP JP2012183130A patent/JP5972711B2/en active Active
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2013
- 2013-08-22 KR KR1020157003793A patent/KR20150030768A/en active Application Filing
- 2013-08-22 US US14/421,996 patent/US9463856B2/en active Active
- 2013-08-22 KR KR1020177015016A patent/KR102042906B1/en active IP Right Grant
- 2013-08-22 WO PCT/JP2013/072409 patent/WO2014030697A1/en active Application Filing
- 2013-08-22 CN CN201380042518.5A patent/CN104540729A/en active Pending
- 2013-08-22 EP EP13830463.9A patent/EP2873605B1/en active Active
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US20150239540A1 (en) | 2015-08-27 |
EP2873605A1 (en) | 2015-05-20 |
KR20150030768A (en) | 2015-03-20 |
KR102042906B1 (en) | 2019-11-27 |
CN104540729A (en) | 2015-04-22 |
EP2873605A4 (en) | 2015-07-08 |
JP5972711B2 (en) | 2016-08-17 |
KR20170065678A (en) | 2017-06-13 |
JP2014040169A (en) | 2014-03-06 |
US9463856B2 (en) | 2016-10-11 |
WO2014030697A1 (en) | 2014-02-27 |
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